Lifting jack frame



1963 R. E. HARVEY LIFTING JACK FRAME Filed Nov. 5, 1958 Y1 5 mvrewrae:

101,920 //me va United States Patent Office 3,073,570 Patented Jan. 15,1963 My invention relates to new and useful improvements in lifting jackframes. A common type of lifting jack comprises a substantially squarebase plate, and a single standard extending upwardly therefrom. Alifting bracket can be moved up and down the standard by means ofreciprocating a handle, said bracket engaging the standard by means of aratchet action.

This particular type of jack is relatively unsteady, particularly whenused on uneven surfaces. However, hydraulic jacks are available which,in combination with a cross bar, give a certain amount of stability tothe implement or automobile being lifted. The extremely high cost ofsuch hydraulic jacks however precludes use except by such organizationsas repair shops and the like.

My jack frame overcomes these disadvantages by providing a frame withinwhich a standard conventional lifting jack can be placed and which isextremely stable, even on uneven surfaces. I provide a base framework,with a pair of standards extending upwardly therefrom and a liftingcomponent slidably engageable upon the flanges of the standards, saidlifting component, of course, being actuated by the conventional jack.

The principal object and essence of my invention, therefore, is toprovide a device of the character herewithin described, adapted to beused with a conventional single standard jack and which is provided witha wide angle space framework thus adding materially to the stability ofthe device.

A further object of my invention is to provide a device of the characterherewithin described which includes a transverse lifting componentactuated by the associated jack, said lifting component having a pair ofwork engaging pads or brackets detachably secured thereupon and whichare variable in position to enable the frame to be used under a greatvariety of conditions.

Another object of my invention is to provide a device of the characterherewithin described which transforms the action of a conventional jackto a wide span supporting jack thus stabilizing the implement orautomobile on which it is being used.

A yet another object of my invention is to provide a device of thecharacter herewithin described which is extremely simple inconstruction, economical in manufacture, and otherwise well suited forthe purpose for which it is designed.

With the foregoing objects in view, and such other objects andadvantages as will become apparent to those-skilled in the art to whichthis invention relates as this specification proceeds, my inventionconsists essentially in the arrangement and construction of parts all ashereinafter more particularly described, reference being had to theaccompanying drawings in which:

FIGURE 1 is a front elevation of my device.

FIGURE 2 is a side elevation of an alternative embodiment thereof.

FIGURE 3 is a top plan view of FIGURE 1.

'In the drawings like characters of reference indicate correspondingparts in the different figures. I

Proceeding, therefore, to describe my invention in detail, referenceshould be made to the accompanying drawings in which I have illustratedin phantom, a conventional lifting jack comprising a substantiallyrectangular base 1, a standard 2 extending upwardly therefrom, and aconventional lifting component 3 actuated up and down the standardbyrmeans of the reciprocating handle 4.

My device comprises a base framework collectively designated 5 and alift component collectively designated 6.

Specifically the base framework comprises a pair of spaced and parallelmembers 7 with cross members 8 at spaced intervals therebetween, theends 9 of the members 7 having ground engaging wheels 10 journalled forrotation thereon. Stabilizing legs 11 extend diagonally outwardly fromthe opposite end 12 of the members 7 and terminate in ground engagingpads 13, as clearly shown in FIGURE 3.

A pair of standards taking the form of open-ended channel members 14,are secured as by welding, by the lower ends thereof, to the members 7and extend upwardly therefrom in spaced and parallel relationship, itbeing observed that the flanges 15 of the channel members face outwardlyfrom one another. A cross member 16 spans the upper end 17 of thestandards and is welded thereto thus maintaining spaced and parallelrelationship and it will be observed that this cross member 16 isapertured as at 18, to receive the upper ends 19 of the jack standard20, it being observed that the base 1 of the jack fits in between themembers 7 and two of the cross bars 8.

The lift component 6 comprises a cross bar 21 having a pair of members22 secured thereto as by welding and extending from one side thereof inspaced and parallel relationship. These members are grooved as at 23 sothat the grooves engage the flanges 15 of the standards 14, reinforcingplate 24 being welded against the members 22 and engaging the outer sideof the channels.

It will, therefore, be appreciated that the lift component can be movedup and down the channel standard and thus it can be situated on eitherof the flanges of the pair of standards.

The work engaging brackets collectively designated 25, are detachablyengageable upon the cross bar '21 and the underside view of the righthand bracket 25 shows the construction of this bracket (see FIGURE 3).

A length of angle iron 26 is welded by one end thereof to a Workengaging pad 27 which is also a length of angle iron, said length ofangle iron 26 extending upwardly at right angles from the pad 27. A flatplate 28 is also welded to the pad 27 and extends upwardly therefromspaced and parallel from the angle iron 26 and bridging piece 29 iswelded to the upper end of the members 26 and 28' thus maintaining thespaced relationship therebetween, and it will be observed that the spacebetween the members 26 and 28 is just sufficient to allow the bracket 25to he slid on and off the cross bar 21. Finally, a bolt or pin 30 spansthe members 26 and 28 intermediate the ends thereof and is sopositioned, that in conjunction with the cross piece 29, permits thework engaging bracket to be situated as shown on the left-hand end ofthe cross bar in FIGURE 1 or, alternatively, permits it to be reversedto take up the position shown on the righthand end of the cross bar inFIGURE 1. It will also be appreciated that the work engaging bracket 25shown on the left of FIGURE 1 can be swung over degrees to pointinwardly and that the use of the angle iron 27 as a pad, presents a flatsurface which may be engaged under the vehicle or chassis that is beingraised.

In FIGURE 2, the lift component is mounted for reciprocation upon thechannels by means of a pair of side plates 31, carrying rollers orwheels 32 at each end thereof. The vertical misalignment of the wheelsis such that one set pass upon the rear side of the channels and theother set pass on the other side of the flanges, thus giving smoothreciprocation and stable mounting for the lift component.

In operation, the conventional jack shown in phantom is positionedwithin the frame with the extremities 19 of the standard 20 extendingthrough aperture 18. The lift component 6 is then engaged on the flangesof the standards 14 and the work engaging components positioned as bestsuited for the work to be undertaken. The lift component 3 of theconventional jack is then engaged under the cross bar 21 and the handle4 actuated to raise the component 3 of the jack together with the liftcomponent 6.

Since various modifications can be made in my invention as hereinabovedescribed, and many apparently widely different embodiments of same madewithin the spirit and scope of the claim without departing from suchspirit and scope, it is intended that all matter contained in theaccompanying specification shall be interpreted as illustrative only andnot in a limiting sense.

What I claim as my invention is:

A lifting frame for use with a conventional lifting jack of the typehaving a base, a standard extending upwardly from said base and alifting member movable upwardly and downwardly on said standard, saidlifting frame comprising a substantially rectangular base frameincluding a pair of side members and a pair of end members, a pair ofopen-ended vertical channels secured at their lower ends to said sidemembers of said base frame and disposed at the outside of said sidemembers with the flanges of said channels extending outwardly, a crossbar secured to and extending between the upper ends of said verticalchannels and provided with a central aperture, said base frame beingadapted to receive the base of a conventional lifting jack between theside members thereof whereby to prevent displacement of the jack base onthe ground and said aperture of said cross bar being adapted to receivethe upper end portion of the jack standard whereby to prevent the jackfrom tipping, a horizontal bar extending transversely of and mounted forraising and lowering movement on said vertical channels, means on saidhorizontal bar engaging one of the outwardly facing flanges of eachchannel whereby the bar may be removed from said channels, saidhorizontal bar being adapted to be supportably engaged by the liftingmember of the stated jack, and load engaging means on said horizontalbar.

References Cited in the file of this patent UNITED STATES PATENTS D.181,071 Stovern et a1. Sept. 24, 1957 1,477,790 Townsend Dec. 18, 19232,786,650 Bottortf Mar. 26, 957 2,852,229 Gross Sept. 16, 1958 2,867,409Southerwick Jan. 6, 1959 2,895,712 Stovern et al. July 21, 1959

